CN2430594Y

CN2430594Y - Gas regulator

Info

Publication number: CN2430594Y
Application number: CN 99244854
Authority: CN
Inventors: 蒋春生
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-24
Filing date: 1999-09-24
Publication date: 2001-05-16
Anticipated expiration: 2009-09-24

Abstract

The utility model discloses a new gas pressure regulator, which is a gas pressure regulator which can automatically cut off when in superpressure; the gas pressure regulator with a large caliber and high flow quantity can be instantaneously full opened and closed. The caliber of an outlet of the pressure regulator is three specifications larger than the caliber of an inlet; a device composed of a roller assembly, a shifting fork, a sliding sleeve, a cutting off valve rod and a steel ball is arranged in a superpressure cutting off valve causing that a superpressure control shaft rotates; the utility model can realize the goal of superpressure cutting off; the utility model has the advantages of compact structure, rapid reaction of pressure regulation, accurate control large regulating range of outlet pressure and full closing when in zero flow quantity.

Description

Gas pressure regulator, governor

The utility model is a kind of combustion gas air delivery device, and combustion gas long distance tripping is delivered to a kind of automatic pressure regulating device that the preceding low pressure of user's kitchen range is used.

The caliber of pressure governor import and export at present is identical, is installed on the gas pipeline.The right controlled atmosphere of direct acting type is calmed the anger and is made up of main voltage regulator and cut-off valve two-part, and cut-off valve is directly installed on the main voltage regulator.The outlet pressure of pressure governor enters main voltage regulator epithelium cavity of resorption and the film formed cavity of resorption of cut-off valve housing endothelium respectively through the feedback pipe, and spring is arranged on the epithelium, sets up port closing pressure.Cause that owing to gas consumption changes outlet pressure changes, enter cut-off valve through the feedback pipe, move up and down the drive brake rod by epithelium and move up and down, when outlet pressure increased to spring setting close value, brake rod rose and causes that valve rod is out of hand.Valve rod makes inlet close under the promotion of spring, this type of pressure governor is used for small-bore more, small flow (DN50, Q=100M ³/ h is following) excess pressure cutout.

The utility model purpose provides the heavy caliber of instantaneous standard-sized sheet or full cut-off, big flow superpressure is cut off pressure governor automatically.The latus rectum of pressure governor is according to the rate of discharge design at present, and the import caliber does not play one's part to the full.Another object of the present invention is to solve pressure governor to import and export caliber identical, and flow is identical, in fact inlet pressure height, flow are big, and low with outlet pressure, flow is little incompatible.

The purpose of this utility model is achieved in that the import caliber of main voltage regulator is identical with the valve port latus rectum, and the outlet caliber is than big 3 specifications of import caliber.The inlet pressure height, resistance is little, and flow is big, descends through pressure after the valve port pressure regulation, and volumetric expansion, resistance increase, but the caliber increase, flow does not descend, and still keeps adapting with import, and this structure has been given full play to the ability of material.

Limiting pressure closing valve is directly installed on the homophony device, and the homophony device has up and down two sealing surfaces, above the last sealing excess pressure cutout spring is arranged, last seal below the excess pressure cutout axle is arranged, under the effect of spring force, last sealing is pressed on the excess pressure cutout axle.If outlet pressure reaches closing pressure, and lower seal hinders when not closing for some reason.Limiting pressure closing valve is at outlet feedback pressure P ₂Effect down in cut-off valve mechanism cause that the excess pressure cutout axle rotates, and closes sealing rapidly.

Spring setting pressure in the limiting pressure closing valve on the epithelium is during with the outlet feedback pressure balance epithelium under, and epithelium drives pulley assembly through lifting bar, contact with shift fork, and with shift fork sliding sleeve, cut-out valve rod steel ball and spring system maintenance balance.The outlet feedback pressure is higher than the spring setting pressure, and epithelium drive pulley assembly and shift fork disengage, and causes that the super axle that cuts off rotates, and the realization excess pressure cutout is closed.

Since adopted this scheme, joint structure compactness, the pressure conditioned reaction is rapid, the control accuracy of outlet pressure height, and regulation range is big, during zero delivery, closes fully.Valve, pipeline and flange before the homophony device be corresponding to have reduced by 3 specifications, has saved material, has reduced engineering cost, and economic benefit is considerable.

Be described further below in conjunction with accompanying drawing and real row:

Fig. 1 is the longitudinal section schematic representation of homophony device

Fig. 2 be in horizontal plane with the longitudinal section schematic representation of the perpendicular limiting pressure closing valve in the longitudinal section of homophony device.

Among the figure: 1, lower seal 2, valve rod 3, on seal 4, excess pressure cutout spring 5, main epithelium 6, valve port 7, main spring 8, excess pressure cutout axle 9, steel ball 10, spring 11, spring 12, excess pressure cutout valve rod 13, steel ball 14, sliding sleeve 15, excess pressure cutout valve body 16, shift fork 17, pulley assembly 18, epithelium 19, spring 20, lifting bar.

Inlet pressure P among Fig. 1 ₁Be reduced to outlet pressure P through valve port 6 pressure ₂When rate of discharge increased, outlet pressure reduced, and the setting pressure of main spring 7 is greater than the outlet pressure P of epithelium 5 cavity of resorptions ₂The active force of feedback, main epithelium 5 descends, and drives valve rod 2 and lower seal 1 and moves down, and makes valve port 6 open greatly outlet pressure P ₂Increase.When flow reduces, outlet pressure P ₂Increase, the setting pressure of main spring 7 is less than the outlet pressure P of main epithelium 5 cavity of resorptions ₂The active force of feedback moves on the main epithelium 5, drives on the lower seal 1 by valve rod 2 and moves, and valve port 6 is turned down, and pressure descends, until closing.When flow equals zero, no matter inlet pressure P ₁How changing, valve port 6 all can be closed tightly under the effect of main spring 7.

As outlet pressure P ₂Feedback effect power surpass the closing pressure that main spring 7 is set, and lower seal 1, barrier and when not closing for some reason, the cavity of resorption of the epithelium 18 of limiting pressure closing valve 15 in Fig. 2, outlet pressure P ₂Feedback force, make down cavity pressure surpass the excess pressure cutout pressure that spring 19 is set, epithelium 18 is risen, drive pulley assembly 17 swings by lifting bar 20, disengage with shift fork 16, shift fork 16 drives sliding sleeve 14 and moves, thereby makes 7 steel balls 13 that are stuck in excess pressure cutout valve rod 12 grooves loosening, and excess pressure cutout valve rod 12 can move.Under spring 11 effects, excess pressure cutout valve rod 12 promotes steel ball 9 to spring 10 motions.Simultaneously in Fig. 1, under the effect of excess pressure cutout spring 4, excess pressure cutout axle 8 is rotated, on seal 3 and move down, valve port 6 is closed automatically.Behind the excess pressure cutout, excess pressure cutout Control Shaft 8 can not rotate, need with pulling moving excess pressure cutout valve rod, and manually rotate excess pressure cutout Control Shaft 8 with spanner, sealing 3 is opened simultaneously under the effect of right spring 10, steel ball 9, excess pressure cutout are sent out bar 12 reversing motions, and shift fork 16 is contacted again with pulley assembly 17, and pressure governor moves in setting the outlet pressure value again.

Claims

1, a kind of gas pressure regulator, governor is made up of main voltage regulator and limiting pressure closing valve, it is characterized in that limiting pressure closing valve is directly installed on the main voltage regulator of the big flow of heavy caliber, two sealing surfaces are up and down arranged in the main voltage regulator, above the last sealing excess pressure cutout spring is arranged, the superpressure Control Shaft of the following superpressure segment valve of last sealing, under the effect of spring force, last sealing is pressed on the superpressure Control Shaft.

2, as claim 1, described gas pressure regulator, governor, it is characterized in that described main voltage regulator import caliber is identical with the valve port latus rectum, the outlet caliber is bigger than import caliber.

3, as claim 1, described gas pressure regulating valve, it is characterized in that skin is touched to drive pulley assembly by lifting bar and contact that steel ball is compressed by the shift fork sleeve with shift fork, the segment valve rod keeps desired location under spring force.

4,, it is characterized in that outer pipe is through than big three specifications of import caliber as claim 1,2, described gas pressure regulator, governor.